Northern Secondary School is a public high school in Toronto, Ontario, Canada. It teaches grades 9 through 12. It is a part of the Toronto District School Board (TDSB). Prior to Amalgamation of Toronto in 1998, it was within the Toronto Board of Education (TBE). The closest TTC subway station is Eglinton.

The Toronto Board of Education, officially known as the Board of Education for the City of Toronto, is the former secular school district serving the pre-merged city of Toronto. The board offices were located at 155 College Street. Following a referendum in 1900, the Toronto Board of Education was created in 1904 from the merger of the Toronto Public School Board, the Collegiate Institute Board, and the Technical School Board.